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diff --git a/test/lisp/eshell/em-alias-tests.el b/test/lisp/eshell/em-alias-tests.el
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+;;; em-alias-tests.el --- em-alias test suite  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2022 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Tests for Eshell's alias module.
+
+;;; Code:
+
+(require 'ert)
+(require 'esh-mode)
+(require 'eshell)
+(require 'em-alias)
+
+(require 'eshell-tests-helpers
+         (expand-file-name "eshell-tests-helpers"
+                           (file-name-directory (or load-file-name
+                                                    default-directory))))
+;;; Tests:
+
+(ert-deftest em-alias-test/simple-alias ()
+  "Test a simple alias with no arguments"
+  (with-temp-eshell
+   (eshell-insert-command "alias say-hi 'echo hi'")
+   (eshell-match-command-output "say-hi" "hi\n")
+   (eshell-match-command-output "say-hi bye" "hi\n")))
+
+(ert-deftest em-alias-test/alias-arg-vars ()
+  "Test alias with $0, $1, ... variables"
+  (with-temp-eshell
+   (eshell-insert-command "alias show-args 'printnl $0 \"$1 $2\"'")
+   (eshell-match-command-output "show-args one two" "show-args\none two\n")))
+
+(ert-deftest em-alias-test/alias-arg-vars-indices ()
+  "Test alias with $1, $2, ... variables using indices"
+  (with-temp-eshell
+   (eshell-insert-command "alias funny-sum '+ $1[0] $2[1]'")
+   (eshell-match-command-output "funny-sum (list 1 2) (list 3 4)"
+                                "5\n")))
+
+(ert-deftest em-alias-test/alias-arg-vars-split-indices ()
+  "Test alias with $0, $1, ... variables using split indices"
+  (with-temp-eshell
+   (eshell-insert-command "alias my-prefix 'echo $0[- 0]'")
+   (eshell-match-command-output "my-prefix"
+                                "my\n")
+   (eshell-insert-command "alias funny-sum '+ $1[: 0] $2[: 1]'")
+   (eshell-match-command-output "funny-sum 1:2 3:4"
+                                "5\n")))
+
+(ert-deftest em-alias-test/alias-all-args-var ()
+  "Test alias with the $* variable"
+  (with-temp-eshell
+   (eshell-insert-command "alias show-all-args 'printnl $*'")
+   (eshell-match-command-output "show-all-args" "\\`\\'")
+   (eshell-match-command-output "show-all-args a" "a\n")
+   (eshell-match-command-output "show-all-args a b c" "a\nb\nc\n")))
+
+(ert-deftest em-alias-test/alias-all-args-var-indices ()
+  "Test alias with the $* variable using indices"
+  (with-temp-eshell
+   (eshell-insert-command "alias add-pair '+ $*[0] $*[1]'")
+   (eshell-match-command-output "add-pair 1 2" "3\n")))
+
+(ert-deftest em-alias-test/alias-all-args-var-split-indices ()
+  "Test alias with the $* variable using split indices"
+  (with-temp-eshell
+   (eshell-insert-command "alias add-funny-pair '+ $*[0][: 0] $*[1][: 1]'")
+   (eshell-match-command-output "add-funny-pair 1:2 3:4" "5\n")))
+
+;; em-alias-tests.el ends here